Dental cabinet attachment.



W. B; MILLER. y, '1 DENTAL CABINET ATTACHMENT.

\ APPLICATION FILED 00125, 1910. l

Patented Oct. 31, 1911.

WILLIAM B. MILLER, or AL'rooNA, PENNSYLVANIA.

DENTAL CABINET ATTACHMENT.

Specification of Letters Patent. -Pa,tented Oct. 31, 1911.

Application filed October 25, 1910. Serial No. 589,086.

To all whom itmay concern:

Be it known that I, WILLIAM B. MILLER, a citizen of the United States,residing in the city of Altoona, county of Blair, and State ofPennsylvania, have invented new and useful Improvements in DentalCabinet Attachments, of which the following is a specification.

My invention relates to improvements in attachments for dental cabinets,which supplies a need that economizes space and saves time forperforming dental operations.

It is also intended to act as a convenient shelf for holding smallobjects which may be used during an operation.

I attain these objects by the mechanism illustrated in the accompanyingdrawing,

in which- Figure 1 is a perspective view of the attachments and a cornerof a steel dental cabinet. Fig. 2 is a cross section through the centerof the device. Fig. 3 is a plan of the device attached, with a portionof the cabinet in section. Figs. 4 and 5 are plans of modifications tobe used on cabinets constructed of wood or other soft material. Fig. 6is a perspective view of a slab to be used in connection with the shelfon the attachment.

The device consists of a support A which fits over the upper end of ahinge B on a steel dental cabinet. It slides on a hinge from above downand is held substantially in position by reason of the portion that iscut out fitting snugly around the upper end of the hinge. In order tomake it more secure a set-screw C is put in the side of the support Aand this comes in contact with the upper portion of the hinge when thescrew is turned in, so that the support is held rigidly in position. Theupper surface of the support A has a small pin D inserted near thecorner of the cabinet, and there is a small pin on the opposite side soas to prevent the shelf from coming in contact with the cabinet ineither of its extreme positions. In the center of the support A isdrilled a hole E having a thread cut in it, and a thumb screw F insertedin this opening acts as a pivot for the arm G upon which a shelf H ispivoted at the outer edge by means of a small carriage bolt I. The arm Gis held in a number of different positions by means of a set screw Jwhich engages conical holes K in the upper surface of thesupport A. Theshelf H is held in any adjusted position by means of the set screw Lwhich passes through the arm G and engages the lower surface of theshelf H. The shelf H is formed with guides N into which a supportingplate M is inserted. This supporting plate may be formed in one piecewith a mortar O, orit may be plain as shown at M', Fig. 6. It may beformed of glass, porcelain, hard or soft rubber, or an other suitablematerial. The mortar O is intended for mixing amalgams. For mixingcements and enamels 'a ground glass plate is preferable. A soft rubbermat is preferable for holding any object which may be placed upon theshelf, such as a glass, bottle, etc.

From the above description it can readily be seen that this dentalattachment provides a long felt want in the way of a shelf which can,when out of use, be swung'out of the way close to the side of thecabinet, and when needed can be brought forward to any position desiredfor mixing amalgams, cements, and enamels, or to be used as a supportingshelf. When the set screw J engages the openings K the shelf is heldrigidly in position and it is impossible to upset or spill liquids btouching the shelf. By reason of the use 0 this s ecial form offastening means shown at A, a steel dental cabinet need not be modifiedand no holes need be drilled in it to fasten the attachment. If a woodencabinet is used the .support can be modified as shown in Figs. 4 and 5so that the attachment can be put on the corner of the cabinet oragainst the side. In either case the arm and the shelf would be of thesame construction as shown in Figs. 1 and 2. The support would also bethe same except for the modification necessary to attach it to thevdifferent forms of cabinets. Ii Figs. 4 and 5 wood screws or tacks areused to hold the support on the cabinet. 1

I am aware that prior to my invention adjustable supporting shelves werein use, but

not of this construction nor for this purpose.

I, therefore, do not claim a supporting shelf broadly, but

I claim In a dental bracket the combination of .a securing meansconsisting of .a base, an opening in said base adapted to slide over thepintle of a hinge or pro ection on a dental cabinet; said opening alsoadapted to 'restagainst the cabinet or projection on the sired, aremovable supporting surface for same so as to prevent lateral movementof the shelf, and means for readily changing the base, a swinging armhinged to said the supporting surface of said shelf.

base, means for holding said arm in any ad- WILLIAM B. MILLER. justedposition, a pivoted supporting shelf Witnesses:

on the outer end of said arm, means for C. B. HICKS,

holding said shelf from rotating when de- KATHERINE KANE.

